判断数值中是否包含某元素并删除

let id = item.idif ($.inArray(id, this.selectedData) === -1) {   this.selectedData.push(id)} else {   this.removeByValue(this.selectedData, id)}//删除重复元素function removeByValue (arr, val) {     for (var i = 0; i < arr.length; i++) {       if (arr[i] === val) {          arr.splice(i, 1)          break       }     }}